1.How can I deal with the 'trial mode' .Because unity seems not have such a api to detect whether is trial mode.If it is necessary to look into the source code of vs express. 2.How can write a link of 'more games' or 'rate and reivew' like appstore's search url and rate url by appid. I don't know whether I can process these problems just by myself but not use other plugins. And I realy hope unity could at least create a trial mode detect api. Because most of the apps on wp8 store has trial version.